JPH01162920A - Segment input/output system - Google Patents

Abstract

PURPOSE:To apply a virtual memory system without deteriorating an overall system performance by eliminating the seeking time out of the input/output I/O queuing time to a designated segment and reducing the I/O queuing time. CONSTITUTION:A primary part of a segment input/output system is constituted of a magnetic disk device 1 containing a fixed head, a program file 2, a segment name storing file 3, an input/output means 4, a loading means 5, a segment name input means 6, a segment name input means 6, a segment name register means 7, a main memory unit 8, and a segment information storing area 9. The I/O operations of segments are carried out by means of the fixed head area of the device 1. Thus the seaking time of the I/O queuing time of the device 1 is eliminated to a designated segment. As a result, the application of a virtual memory system is attained without deteriorating the overall system performance.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a segment input/output method, and in particular, the present invention relates to a segment input/output method. The present invention relates to a segment input/output method in a computer system (hereinafter simply referred to as a system) that is operated by allocating a magnetic disk device.

[Conventional technology]

Conventionally, in this type of segment input/output method, even when a fixed head magnetic disk device is used as an auxiliary storage device for saving segments, segment input/output is performed while being aware that it is a fixed head magnetic disk device. I went there.

[Problem that the invention seeks to solve]

In the conventional segment input/output method described above, an arbitrary free area of a magnetic disk device with a fixed head is randomly allocated as a segment save area, so the head seek time and rotational wait time are reduced when saving and restoring segments. It has the disadvantage of increased physical input/output (Ilo) latency.

In particular, as the main memory unit becomes full and congested, the number of 110 times increases, so the overall I
This method has the drawback of increasing the waiting time and deteriorating the overall system performance.

In view of the above-mentioned points, an object of the present invention is to convert a pre-specified segment into an area corresponding to a fixed head of a magnetic disk device with a fixed head (hereinafter referred to as a fixed head area).
An object of the present invention is to provide a segment input/output method that reduces the I10 waiting time by eliminating the seek time of the 110 waiting time for a prespecified segment by saving the I10 waiting time.

[Means for solving problems]

The segment input/output method of the present invention is applicable to a computer system in which an operating system that employs a virtual memory method allocates a magnetic disk device with a fixed head as an auxiliary storage device to save segments from a main memory unit. A segment name registration means for registering a program file in which a program is stored, a segment name of a segment that is to be stored in the fixed head area of the fixed head magnetic disk device among the segments constituting the program, and this segment name registration. a segment name storage file for storing the segment name registered by the means; a segment name input means for inputting the segment name of the segment to be stored in the fixed head area from the segment name storage file;
a segment information storage area for storing where in the fixed head magnetic disk device the segment has been saved;
If a segment in the program read from the program file when loading the program into the main memory unit has a segment name that matches the segment name obtained by the segment name input means, it is stored in the fixed head area at the same time. loading means for writing into the segment information storage area a segment name, a magnetic disk device address, and a fixed head area storage flag indicating that the segment has been stored in the fixed head area; When saving a segment, the segment information storage area is referred to, and if the segment should be stored in the fixed head area based on the fixed head area storage flag, the magnetic disk device address is used as is and the fixed head is saved. If the segment is other than the segment to be stored in the fixed head area, the segment is evacuated to the free area of the magnetic disk drive with a fixed head and the magnetic disk drive address is updated. When restoring a segment from the fixed head magnetic disk device to the main memory unit, the segment information storage area is referred to and the segment is restored from the magnetic disk device address of the fixed head magnetic disk device to the main memory unit. and input/output means for restoring.

[Effect]

In the segment input/output method of the present invention, a program is stored in a program file, and the segment name registration means specifies the segment name of the segment that is to be stored in the fixed head area of a magnetic disk device with a fixed head, among the segments constituting the program. the segment name storage file stores the segment name registered by the segment name registration means, the segment name input means inputs the segment name of the segment to be stored in the fixed head area from the segment name storage file, The segment information storage area memorizes where in the fixed head magnetic disk device the segment has been saved, and when the loading means loads the program into the main memory unit, the segment name input means obtains the segment in the program read from the program file. If the segment has a segment name that matches the specified segment name, it will be stored in the fixed head area, and at the same time the segment name, magnetic disk device address, and fixed head area storage flag indicating that the segment has been stored in the fixed head area will be stored as segment information. When the input/output means saves a segment from the main memory unit to a magnetic disk device with a fixed head, it refers to the segment information storage area and selects the segment that should be stored in the fixed head area based on the fixed head area storage flag. If there is, it is evacuated to the fixed head area of the magnetic disk device with a fixed head using the magnetic disk device address as is.If the segment is not a segment that should be stored in the fixed head area, it is evacuated to the free area of the magnetic disk device with a fixed head. When restoring a segment from a magnetic disk device with a fixed head to the main memory unit by updating the magnetic disk device address, refer to the segment information storage area and restore the segment from the address of the magnetic disk device of the magnetic disk device with a fixed head to the main memory unit. Restore to unit.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the segment input/output method of the present invention. Its main parts are composed of a name storage file 3, an input/output means 4, a loading means 5, a segment name input means 6, a segment name registration means 7, a main memory unit 8, and a segment information storage area 9. has been done.

A magnetic disk device l with a fixed head is provided with a fixed head 1.1 corresponding to a fixed head area and a movable head 12 corresponding to an area other than the fixed head area.

The segment information storage area 9 contains segment names 91 and
A plurality of sets of fixed head area storage flags 92 and magnetic disk device addresses 93 are registered. The fixed head area storage flag 92 is turned on (“1”) when the segment is a segment that should be stored in the fixed head area.
”), this flag is set to off (“0′) for other segments.

Referring to FIG. 2, the processing of the segment name registration means 7 consists of a segment name acquisition step 21 and a segment name registration step 22.

Referring to FIG. 3, the processing of the segment name input means 6 consists of a segment name extraction step 31 and a segment name delivery step 32.

Referring to FIG. 4, the processing of the loading means 5 includes a segment name input means activation step 41, a segment input step 42, a fixed head area storage determination step 43,
Fixed head area storage step 44, Fixed head area storage availability determining step 45, Segment name, fixed head area storage flag and magnetic disk device address registration step 46, Segment name registration step 47, Segment main memory unit loading step 48 and a segment end determination step 49.

Referring to FIG. 5, the processing at the time of segment restoration by the input/output means 4 includes the magnetic disk device address acquisition step 51.
and a segment main memory unit load (restore) step 52.

Referring to FIG. 6, the process performed by the input/output means 4 when retracting a segment includes a fixed head area storage flag determination step 61.
, a segment free area storage step 62 , a magnetic disk device address registration step 63 , and a segment fixed head area storage step 64 .

Next, the operation of the segment person output method of this embodiment configured as described above will be explained.

Before starting loading of the program from the program file 2 to the main memory unit 8, the segment name registration means 7 registers the fixed head magnetic disk device l of the segments constituting the program in the program file 2.
The segment salt to be stored in the fixed head area is input (step 21) and registered in the segment name storage file 3 (step 22).

When the loading means 5 is activated to load the program from the program file 2 to the main memory unit 8, the loading means 5 first activates the segment name input means 6 (step 41).

The activated segment name input means 6 extracts the segment salt of the segment to be stored in the fixed head area of the fixed head magnetic disk device 1 from the segment name storage file 3 (step 31), and loads the extracted segment salt into the load means 5. (step 32).

Next, the loading means 5 reads one segment in the program stored in the program file 2 (step 42), and compares the segment salt of the read segment with the segment salt of the segment to be stored in the fixed head area. , it is determined whether the segment should be stored in the fixed head area (step 43). If the segment is to be stored in the fixed head area, the loading means 5 stores the segment in the fixed head magnetic disk apparatus l in order to check whether the segment can actually be written in the fixed head area of the fixed head magnetic disk apparatus l. (step 44), and then it is determined whether the segment can be stored in the fixed head area (step 45). If the segment can be stored in the fixed head area, the loading means 5: In the segment information storage area 9, the segment salt 91 of the stored segment and the segment salt 91 indicating that the segment has been stored in the fixed head area (
(on) fixed head storage flag 92 and the magnetic disk device address 9 of the fixed head area where the segment was written.
3 (step 46).

If the segment is not to be stored in the fixed head area in step 43 and if the segment cannot be stored in the fixed head area in step 45, the loading means 5 registers only the segment salt 91 in the segment information storage area 9 (step 47).

Subsequently, the loading means 5 loads the segment into the main memory unit 8 (step 48), and determines whether the segment in the program is finished (step 4).
9) If the segment has not ended, the process returns to step 42 and the process is repeated until the segment ends, and when the segment ends, the loading means 5 ends the process.

Next, when the program on the main memory unit 8 is executed and the main memory unit 8 becomes congested and it becomes necessary to save a certain segment in the main memory unit 8 to the magnetic disk device l with a fixed head, The output means 4 refers to the segment information storage area 9 and selects a segment to be stored in the fixed head area depending on whether a fixed head area storage flag 92 corresponding to the segment name 91 of the segment to be saved is on or not. If the segment is to be stored in the fixed head area (step 61), the segment is stored in the fixed head area of the magnetic disk device l with a fixed head indicated by the magnetic disk device address 93 in the segment information storage area 9. Write out the segment (step 64). In this case, the fixed head 11 writes out the segment in the fixed head area, so the head seek time is reduced [10
Segments are quickly saved during the waiting time. on the other hand,
If the segment is a segment other than the segment to be stored in the fixed head area, the input/output means 4 writes the segment to an arbitrary free area of the fixed head magnetic disk device l using the movable head 12 (Step 62), the segment information storage area 9 The magnetic disk device address 93 of the area where the segment is stored is registered in (step 63).

Conversely, when it becomes necessary to restore a segment in the main memory unit 8 from the fixed head magnetic disk device 1, the input/output means 4 inputs the segment name 9I of the segment to be restored in the segment information storage area 9. The corresponding magnetic disk device address 93 is obtained (step 51), and the segment is read from the area on the fixed head magnetic disk device 1 indicated by the disk device address 93 and loaded (restored) into the main memory unit 8 ( At this time, if the segment to be restored is a segment stored in the fixed head area, the segment is read from the fixed head area by the fixed head II, so the head seek time is reduced and the I10 Segment restoration is performed quickly with no waiting time.

Thereafter, the program is executed while the processing by the input/output means 4 is repeated.

〔Effect of the invention〕

As explained above, the present invention reduces the I10 waiting time of a magnetic disk device with a fixed head for a pre-designated segment by performing segment input/output using the fixed head area of the magnetic disk device with a fixed head. Since the seek time is eliminated, a virtual memory method can be introduced without reducing the processing efficiency of the entire system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a segment input/output method according to an embodiment of the present invention, FIG. 2 is a flowchart showing the processing of the segment name registration means in FIG. 1, and FIG. FIG. 4 is a flowchart showing the processing of the segment name input means; FIG. 4 is a flowchart showing the processing of the loading means in FIG. 1; FIG. 5 is a flowchart showing the processing of the input/output means in FIG. 1 during segment restoration. . FIG. 6 is a flowchart showing the processing of the input/output means in FIG. 1 when saving a segment. In the figure, l...Fixed head magnetic disk drive, 2...Program file, 3...Segment name storage file, 4...I/O means, 5...Loading means, 6...Segment name input means, 7... segment name registration means, 8... main memory unit, 9... segment information storage area, 11... fixed head, 12... movable head, 91... segment name , 92...Fixed head area storage flag, 93...Magnetic disk device address.

Claims (1)

[Claims] In a computer system in which an operating system employing a virtual memory method allocates and operates a magnetic disk device with a fixed head as an auxiliary storage device for saving segments from a main memory unit, a program is stored. a segment name registration means for registering a segment name of a segment that is to be stored in the fixed head area of the fixed head magnetic disk device among the segments constituting the program; a segment name storage file for storing segment names that have been stored in the fixed head area; a segment name input means for inputting segment names of segments to be stored in the fixed head area from the segment name storage file; a segment information storage area for storing where segments have been saved; and a segment in the program read from the program file when loading the program into the main memory unit matches the segment name obtained by the segment name input means. If it is a segment with a segment name, it is stored in the fixed head area, and at the same time a segment name, a magnetic disk device address, and a fixed head area storage flag indicating that the segment is stored in the fixed head area are written in the segment information storage area. means, when evacuating a segment from the main memory unit to the magnetic disk device with a fixed head, refer to the segment information storage area and select a segment to be stored in the fixed head area based on the fixed head area storage flag. If so, the magnetic disk device uses the magnetic disk device address as it is and saves it to the fixed head area of the magnetic disk device with a fixed head, and if the segment is a segment other than the segment that should be stored in the fixed head area, the magnetic disk device with a fixed head uses the address as is. When restoring a segment from the fixed head magnetic disk device to the main memory unit by updating the magnetic disk device address by evacuating the segment to a free area of the fixed head magnetic disk device, the fixed head magnetic disk device refers to the segment information storage area. an input/output means for restoring a segment to the main memory unit from the magnetic disk device address of the segment input/output method.